Doesn't work for Resolve timeline starting with an hour

[ecnelson]

I have a Resolve NDF timeline with start timecode of '01:00:00:00' with frame rate 29.97
I wish to export a series of frames indicated by (blue) timeline markers

The first marker is at 01:01:10:03
timeline.GetMarkers() reports this marker at frame 2103

s.fps = 29.97
s.df = False
s.getframes('01:00:00:00') → 107892
s.gettc(107892 + 2103) → '01:01:10:05'

It's off by two frames.

If I instead do:
'01' + s.gettc(2103)[2:] → '01:01:10:03
which is correct.

So there's something about going beyond an hour that's an issue.

That said, this may actually be a Resolve issue… as timeline.GetStartFrame() → 108000 which is incorrect for a 29.97 frame rate. In any case, I'd like this to "just work"